Scribe Post  for May 9, 2012

Today In Class:

-Got back worksheets and went over them

-Went over Nutrient lab

-Took the Design a Quiz

-Reviewed for Test May 10!

Homework:

-Study!!!!!

Today we went over the digestion worksheets, the frog lab, the Nutrient lab and also got our Tissues and Excretion quizzes back.

Important things for test:

-Go over labs because there may be questions

-Know the different enzymes, what they do and where they are found.

And  that was it for today!

Don’t forget to study and good luck!

Next Scribe:Anna 

Scribe Post 5/7

Hi Class!!!

In class today we-

• Collected lab 55 (frog lab)
•  Stamp nutrient pre-lab
• Went over class data from calorimetry lab
• went over nutrient lab pre-lab 
• Practice quiz

Homework-

• Design a quiz due TOMORROW!
• Finish calorimetry lab 
• Test Thursday, Study!!!

*** Just a reminder about the design a quiz! It should be 20 questions. the 

questions should be thought provoking and at an honors course level. Make sure that you use variations of questions like fill in the blank, multiple choice, and matching. Add at least one diagram in it. 


For a long time in class today we reviewed the calorimetry lab. Everyone was a little bit confused of how to find answers to how find energy content in a food. 


Remember these things, the basic formula for solving the energy content in a food is

Energy content of food = Energy gained by water / The change in the mass of food 

Before you can do that formula, you have to be able to find the energy gained by water. This is the formula for how to solve it.

Energy gained by water = (mass of water) x (Changet of water) x (4.18 J/g C)


Before you can calculate the energy of your food you have to divide your answer by 100. this is because it is in joules and needs to be converted into kilojoules.


Practice that and make sure you know how to do it because you need to understand it for the test!

Next we went over the pre-lab for the nutrient lab!

We will be testing foods for protein, simple sugars, starch, and lipids

We will do these by a variety of tests.. these test are.......

Iodine Test-
Tests for starch. this test is when you use Lugol's iodine solution. this yellow-brown solution will mix with the food. if there is starch present it will turn blue-black in color.  

Benedict's Test - 
Tests for simple sugars. It is blue in color, but when there is sugar it will change to green yellow or brick red.


Biuret Test-
Tests for proteins. When you add the solutions to food and stir, the mixture will either stay blue for negative results or turn pink-purple for positive results. 


Brown Paper Bag Test- (sounds dangerous)
Basically you leave your food on the brown paper bag and if it leaves an oily smeary translucent smear it is positive for lipids. If it does not, then it is negative..


Also remember to bring your own food to test!


Have a good night!


NEXT SCRIBE- JEREMY FINE





 

Scribe Post 5/3

Today in class we...

• Finished the notes packet
• Watched a video

Tonight's Homework...

• Digestion handouts due Friday
• UP p.47-51 Prelab due Friday
• Lab #55 due Monday
• Design a Quiz due Tuesday (closer than you think!)

In the Notes...

• The stomach engages in chemical, and mechanical digestion
• HCl, gastric juice, Rennin, and Pepsin chemically digest
• Constant churning from the stomach mechanically digests
• After the stomach, the "food" moves into the duodenum of the small intestine

• Villi and microvilli absorb the nutrients into the capillaries
• Villi and microvilli increase the surface area, expediting absorption

Moving on to something a little off topic in the notes...

• The old Food Pyramid is no longer effective (Right)
• Based on "servings" which can vary
• Made in 1992, it has recently been revived
• The new Pyramid focuses on easily measurable items

• Orange= Grains; 5-8 oz.
• Green= Vegetables; 2.5 cups
• Red= Fruits; 2 cups
• Yellow= Oils
• Blue= Milk; 3 cups
• Purple= Beans and Meats; 5.5 oz.

• Eating disorders are seriously dangerous, and present all around the world
• Malnutrition: a deficiency of one or more of the essential nutrients
• There are 8 critical amino acids for survival
• Kwashiorkor: Inadequate protein intake. Lack of blood proteins lead to swollen limbs
• Undernutrtion: Lack of the essential amino acids forces the body to break down muscles and brain
• Obesity: Too high of a ratio of weight to height
• 25% of Americans suffer from obesity
• Fat Cravings: Believed to be an evolutionary advancement, a craving for fattening foods
• Anorexia and Bulimia are more common in the US
• Largely caused by harsh media portrayals of "pretty"

Next Scribe: **MINJI WILL***

Scribe Post April 30th

Today In Class:
Stamped UP 13-17
Urinalysis Lab UP 27-38
Went over UP 10-11 and 13-17
Got a study guide ch 21
Urinalysis
In this lab we analyzed 4 different urine samples, to compare them to the "ideal urine". By performing different tests on the urine samples, we had to identify what conditions the patients had. For example, glucose in the urine = diabetes.
Physical Characteristics: we observed the urine


Sample     Color             Clarity                                                           Scent            pH
Patient 1=neon yellow        All were clear ex. patient 3 was cloudy    no scent                6
Patient 2=Light Orange                                                                    smokey scent       4
Patient 3=pale yellow                                                                         sour scent         7
Patient 4= Neon-ish yellow                                                              nothing                 7

Benedict's Test (for sugar)- heated the urine samples with Benedict solution
Before heating:           Color after heating                                              Results (+/-)                                      
all were blue/green     All same as before except Patient 1 was red brown         All - except patient 1 is +
Patient 1 has glucose in urine

Biuret Test (for proteins)-added Biuret solution to the urine samples and examined a color change
Initial Colors                                    Final Color                                      Results
(see physical characteristics chart)     All green except Patient 2 is orange     all - except Patient 2 is +
Patient 2 has protein in urine

We did not get to the microscope part

Page 11:
1. I
2. J         the collecting tubule
3. K (proteins are BIG)
4. E
5. J      no sugar in collecting tubule or else its diabetes
6. D     proteins are BIG

13-17
Kidney Dialysis

There is salt in dialysis bag, not in cup. After, there is salt in the bag, not in the cup. Color of the bad is red, the water is clear. After the bag is still red, but the water is yellow.

1. The bag is the circulatory system. The salt is the blood cells. The waste from the blood is emptied into the cup, the nephron. The salt, blood cells do not get through because they are too big. There shouldn't be blood in the urine
2. Kidneys are like water treatment plants because they filter the solution and pump it back cleaned.
3. Kidneys also are red blood cells producers, and they regulate blood pressure and calcium levels.
4. Urine can be analyzed to determine the condition of a patient. For ex. glucose in urine means diabetes.
5. The blood stays in the circulatory system in a normal kidney. Ammonia goes into the nephron and is excreted as urea.
6. Land animals are constantly losing water.... ( can anyone add?)

HOMEWORK:
Read Ch 22
Quiz tmrw on excretion and tissues!
Design a quiz 5/8
Lab 27-38 finish
UP 39-40
Ch 21 study guide


NEXT SCRIBE.....JEREMY